activeMQ_helloworld(一)

一、activeMQ下载，直接在Linux上wget http://mirror.bit.edu.cn/apache//activemq/5.14.5/apache-activemq-5.14.5-bin.tar.gz

使用tar -zxvf 解压即可，启动activeMQ很简单，直接cd到bin目录，./activemq start即可

activeMQ的默认端口是61616，后台管理界面的端口是8161，如果你的防火墙拦截了这些端口，你需要打开这些端口或者是关闭防火墙，

vim /etc/sysconfig/iptables

修改后需要让修改生效，键入/etc/init.d/iptables restart这条命令即可

2、打开管理界面http://192.168.243.128:8161/admin，输入用户名admin，密码admin，可以看到以下界面

二、生产者代码

package com.aciveMQ;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnectionFactory;

public class Producer {
    
    private static final String BROKER_URL = "tcp://192.168.243.128:61616";
    
    public static void main(String[] args) {
        ConnectionFactory connectionFactory;// 连接工厂
        Connection connection = null;// 连接
        Session session = null;// 会话
        Queue destination;// 目标
        MessageProducer messageProducer;// 消息生产者

        connectionFactory = new ActiveMQConnectionFactory(BROKER_URL);

        try {
            connection = connectionFactory.createConnection();
            
            // 第一个参数表示是否加事物操作，第二个参数Session.AUTO_ACKNOWLEDGE表示自动确认接收，
            //
            session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
            destination = session.createQueue("myFirstQueue");// 创建一个叫做myFirstQueue的目标队列
            
            messageProducer = session.createProducer(destination);// 创建消息生产者
            TextMessage tm = session.createTextMessage("hello world");
            
            connection.start();
            
            messageProducer.send(tm);
            session.commit();// 启动了事物就必须提交，否则不能发消息
        } catch (JMSException e) {
            e.printStackTrace();
        } finally {
            if (connection != null) {
                try {
                    session.close();
                    connection.close();
                } catch (JMSException e) {
                    e.printStackTrace();
                }
            }

        }
    }
    

}

2、消费者

package com.aciveMQ;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnectionFactory;

/**
 * @author may
 *
 */
public class Consumer {
    private static final String BROKER_URL = "tcp://192.168.243.128:61616";

    public static void main(String[] args) {

        ConnectionFactory connectionFactory = null;// 连接工厂
        Connection connection = null;// 连接
        Session session = null;// 会话
        Queue destination;// 目标
        MessageConsumer messageConsumer;

        try {
            connectionFactory = new ActiveMQConnectionFactory(BROKER_URL);
            connection = connectionFactory.createConnection();
            // 第一个参数表示是否加事物操作，第二个参数Session.AUTO_ACKNOWLEDGE表示自动确认接收，
            // 消费消息不需要加事物
            session = connection.createSession(Boolean.FALSE, Session.AUTO_ACKNOWLEDGE);
            destination = session.createQueue("myFirstQueue");// 创建一个叫做myFirstQueue的目标主题
            messageConsumer = session.createConsumer(destination);

            connection.start();

            // receive（long argue）在取到队列中的消息后，会按每1s钟的时间再次读取
            TextMessage textMessage = (TextMessage) messageConsumer.receive(1000);
            if (textMessage != null) {

                System.out.println(textMessage.getText());

            }
            
 48             
            // System.out.println(textMessage);

        } catch (JMSException e) {
            e.printStackTrace();
        } finally {
            if (connection != null) {
                try {
                    session.close();
                    connection.close();
                } catch (JMSException e) {
                    e.printStackTrace();
                }
            }

        }

    }

}

3、pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.aciveMQ</groupId>
    <artifactId>activeMQ_hello</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>activeMQ_hello</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.apache.activemq</groupId>
            <artifactId>activemq-all</artifactId>
            <version>5.14.5</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.21</version>
            <scope>test</scope>
        </dependency>

    </dependencies>
</project>

三、测试
启动生产者，然后再启动消费者，就会输出hello world。